论文部分内容阅读
右江裂谷盆地呈现孤台与台盆相间分布的沉积格局,下二叠统可划分出6个三级层序.沉积背景不同,则层序充填序列、内部构型和成因格架各异.其中孤台层序发育主要受海平面变化和碳酸盐自旋回的控制,以碳酸盐岩为主,层序界面特征明显,通常缺失LST,海平面曲线具有跳跃、间断、不对称特点;台盆层序发育则主要受同沉积断裂活动控制,主要由硅质灰岩、硅泥岩和硅质岩构成,层序发育完整,海平面曲线呈现渐变、连续、对称特征,能客观地反映沉积盆地的连续变化史.右江裂谷盆地层序格架中的有利储集体主要包括:①孤台中受层序界面控制的古岩溶储层;②与LST相关的残积体(孤台)和混屑浊积岩(台盆);③与TST有关的海侵型丘礁滩灰岩(孤台)和钙屑碎屑流沉积(台盆);④与HST有关的丘礁滩灰岩、白云岩(孤台)和钙屑重力流沉积(台盆);⑤碳酸盐孤台.“,”The Youjiang Rifting Basin is of a sedimentary framework of isolated platforms alternating with platform basins and the Lower Permian in the basin may be divided into six 3rdorder sequences.The filling succession,internal configuration and genetic framework of the sequence are various in different sedimentary settings.The isolated platform sequence development is mainly controlled by the sealevel change and carbonate selfcycling,which is mainly composed of c...